module.exports = function (db, callback) {
  // 用户模型
  db.define("PermissionModel", {
    ps_id: { type: 'serial', key: true },
    ps_name: String,
    ps_pid: Number,
    ps_c: String,
    ps_a: String,
    ps_level: String
  }, {
    table: "sp_permission"
  });
  return callback();
}